Stop-motion for knitting-machines.



No. 766,306. PATENTED AUG. 2, 1904. F. WILCOMB.

STOP MOTIGN FOR KNITTING MACHINES. A-PLIGATION FILED 00T. ao. 1903.

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PATENTBD AUG. 2, 1904.

F. WILCOMB. STOP MOTION FOR KNITTING MACHINES.

APPLIOATION FILED 00T. 30. 1903.

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No. 766,306. PATENTED AUG. 2, 1904.

F. WILCOMB. STOP MOTION POR KNITTING MACHINES.

APPLICATION FILED 00T. 30. 1903.

N0 MODEL. 3 SHEETS-SHEET 3.

@Si Eule/z for WW ANK; W//Lco/v@ UNITED STATES Patented August 2, 1904.

PATENT OEEICE..

FRANK IVILOOMB, OF NORRISTOIVN, PENNSYLVANIA, ASSIGNOR TO H. C. COLEMAN, OF NORRISTOVN, PENNSYLVANIA.

STOP-MOTION FOR KNlTTlNG-IVlACHINES.

SPECIFICATION forming part of Letters Patent No. 766,306, dated August 2, 1904.

lApplication filed October 30, 1903.

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Be it known that 1, FRANK VILCOMB, a citizen of the United States, residing' at Norristown, Pennsylvania,have invented certain new and useful Improvements in Stop-Motions for Knitting-Machines, of which the following is a specification.

The object of my invention is to provide brake means designed to be` applied to the form of knitting-machine known as the Mc- Michael and lVildman and designed also to be operated by the form of stop-motion dis-. closed in Letters Patent of the United States granted to me April 22, 1902, No. 698,090.

The features constituting' my present invention and the combination and arrangement of elements also forming' part thereof will be hereinafter described, and particularly pointed out in the claims.

In the accompanying' drawings, Fig'ure 1 is a side elevation of a machine, showing' my improvements attached thereto. Fig'. 2 is a view looking' from the rig'ht of Fig'. 1 with parts omitted. Fig'. 3 is a plan view of my invention attached to the machine. Fig. 4 is a sectional view of the invention taken along' the cam-shaft. Fig'. 5 is a cross-section of Fig'. '-1 in the plane of the side face of the part 45. Fig'. 6 is a view similar to Fig'. 1, showing' the application of my invention to the Ruth type of machine. Figs. 7 and S are detail views.

1n the drawing's, 1 is a knitting-head of the known type referred to above, the movable part of said head being' driven by a fast pulley 2 on a shaft 3.

The belt-shipper connections are the same as those used on the McMichael and lVildman type of machine and are illustrated by me in Letters Patent of the United States g'ranted to me April 22, 1902, No. 698,090, said beltshipper connections comprising' a belt-shipper fork carried by a hand-lever 5, pivoted at 6 to the bracket 7, said lever being' acted on by a rod 9 under tension of a spring' 8, which rod tends constantly to move the lever` into position with the belt on the loose pulley Serial No. 179,259. (No model.)

2. The rod 9 is held against the tension of the said spring' by a latch-lever 10, having' a tooth 11 entering' a groove 12 in the rod, said latch -lever being' pivoted to the machineframe at 13 and having' a handle 14, by which said latch-lever may be operated to let off the driving' mechanism of the machine.

In order to operate the let-off automatically, the machine mentioned is provided with a vertical rock-shaft 15, journaled in the stationary base-plate and having' an arm 16 at its lower end arranged to work on a cam-rib 17 on the latch-lever, so that as the arm swing's to one side it will depress the latch-lever and free the let-ofi' connections. The rock-shaft is operated either by a needle-protector or by the stop-motion connections disclosed in my patent referred to. The needle-protector consists of an arm 1S on a rock-shaft 19, joui'- naled in the knitting-head and having an arm 20 arrang'ed to strike an adjustable linger 21, carried by an arm 22 on the upper end of the vertical rock-shaft 15. The needle-protecting` arm 18 is arranged to be operated when knots or tangles occur at the needles, for which purpose said arm has its inner end adjacent the needles.

In order to operate the let-ofi' connections from the'stop-motion device described in my said patent, the arm 22 has a pin 23 extending into a slot 24 of a link 25, which is pivotally connected to a power-lever 26, pivoted at 27 to the bracket 28 and under tension of a power-spring 29. a trigger 30 engaging' a pin 31 thereon, said trigger being on a rock-shaft 32, journaled in the bracket and operated from the stop-n10- tion head. (Not shown.) The stop-motion devices within the head may be the same as those disclosed in Letters Patent of the United States granted to-me April 22, 1902, Nos. 698,089 and 698,091, and which are controlled either from a sweep or a feeler-iing'er.

The rock-shaft 15 is under tension of a spring' 15, which returns said rock-shaft and arm 22 to normal position after being operated, provided, of course, the stop-motion de- The power-lever is held by vices are reset. This spring is weaker than .the power-spring 29, so that when the powerlever is released from the trigger the powerspring will overcome the returning-spring and operate the let-off.

My present invention concerns a brake and its manner of association with the parts described. The said brake is designed to be arranged between the base-plate of the knit-tinghead and the part 2l of the fast pulley 2, said part 2 being grooved and utilized in the Mc- Michael and Vildman machine for operating the take-up. The brake comprises a bracket 38, secured to the base-plate of the machine by screws 39 and having arms 40 depending from said base-plate, to the lower ends of which bracket.

are pivoted the arms 41 of the brake-shoe 42. This brake-shoe comprises a plate disposed vertically and carrying a piece of leather or other braking material7 which is secured thereto by the pins 43. The brake-shoe has ears 44, pivotally connected to a block 45, arranged on and operated by an eccentric 46, pinned on a shaft 47, extending through and journaled in the bracket, said shaft being under tension of a spring 48, which tends constantly to ro- 1 tate the said shaft and cause the eccentric to move the block and swing the brake-shoe on its pivots, thus forcing the said brake-shoe against the side of the portion 2H of the fast pulley, and thus stop the machine from further revolution. The spring 48 is fixed at one end to the eccentric and at its other end to a collar 49, loose on the shaft and having a toothed rim 50, fitted against the side .face of the This toothed rim is engaged by a detent 51, pivoted to the side of the bracket, and by this construction the tension of the spring may be adjusted.

The brake-shoe is held off of the side of the pulley against the Vtension of the spring` by a latch-lever 52, pivoted at 5.3 to the side of the bracket and having its lower weighted end formed into a curved or cam portion 54. The latch engages with its upper end 55 a locking-disk 56, fixed on the shaft 47, said disk having a shoulder 57 to be engaged by the latch, and thus hold the brake-shoe out of action. As soon as the latch-lever is moved to release the disk 56 the shaft 47 will be turned by the spring, and the brake-shoe will be thrust against the side of the pulley to stop the machine.

The latch is operated by a pin 58 on a bar 59, which bar is engaged by the pin 23, before mentioned, on the arm 22. The bar has also a. pin-and-slot connection 60 with the link 25. This bar is operated. when the arm 22 is operated alone from the needle-protector lever 18, in which instance the pin 23 moves in the slot of the link 25, or it will be operated when the stop-motion devices are operated, the link 25 then pushing the pin 23, together with the bar, so that the pin 58 of the bar will strike the cam-shaped end 54 of the latch-lever, and thus cause the brake to beset against the pulley.

The brake is reset to normal position ready to be operated by a handle on the shaft 47, consisting of a knob 61.

The block 45 is composed of two sections, one of which, 45, is on the eccentric and the other of which is pivoted to the brake-shoe, as before described. These two sections are held adjustably together by a screw 62, aided by set-screws 63, so that wear may be taken up and rthe brake-shoe may be properly adjusted in relation to the side of the pulley.

While I have described my invention with a McMichael and Wildman type of machine and with a stop-motion of the type patented by me, I do not wish to restrict myself in this regard. Where I use the term pulley herein, it will be understood that I mean such a pulley as shown or any device presenting a side to the action of a brake-shoe in a manner similar to that described herein.

In Figs'6.7, and 8 I show how the invention may be applied to a machine known as the Ruth In this machine a latch-lever 11X, similar to the lever 11 above described, controls the let-off rod 9X, excepting that instead of being operated by a lever 16 on the vertical rock-shaft 15 it is operated by a vertically-operating rod 15X, 'which in turn is operated from a boss 15", pivoted to the base of the machine beside the upper end of the vertical rod and having an incline or 'cam surface a, Fig. 6, and bottom plan, Fig. 7, for depressing the rod when the boss is turned, said boss carrying a finger 21 to be operated by the arm 20, before described, when knots or tangles occur at the needles. In my invention I provide the cam-boss with an arm 22X, extending down and connected with the link 25 and bar 59 in a manner similar to that described in connection with the arm 22. This link and bar operate the brake in this form precisely as in the form before described.

What I claim is- 1. In combination, a brake-shoe pivoted at its lower end, an eccentric, a part operated` by the eccentric and pivotally connected with the upper part of the brake-shoe and means for operating the eccentric, substantially as described.

2. In combination, a brake-shoe pivotallyV supported at its lowerl end, an eccentric,a block on the eccentric pivotally connected with the upper part of the brake-shoe, a shaft carrying the eccentric, a spring applying tension to the said shaft, means for holding the shaft and means for releasing the said holding means, substantially as described.

3. In combination, a brake-shoe pivotally supported at its lower end, an eccentric, a block on the eccentric pivotally connected with 'the upper part of the brake-shoe,.a shaft carrying the eccentric, a spring applying tension to the said shaft, means for holding the shaft IOO IIO

consisting' of a notched disk on the shaft and a latch engaging the same, and means for releasing the said holding means, substantially as described.

4. In combination a brake-shoe pivotally supported at its lower end and of substantially arched form to reach over the machine-shaft and a rock-shaft connected with the upper part of the brake-shoe for operating the same, substantially as described.

5. In combination with a circular machine, a brake-shoe comprising a substantially archshaped arm, pivoted at the lower ends of the arms of the arch, a horizontal rock-shaft and a connection from the said rock-shaft pivoted to the brake-shoe, substantially as described.

6. In combination with a machine a rockshat't arranged over the base thereof, a brakeshoe extending' down alongside the base and pivotally supported at its lower end and means connecting the rock-shaft with the upper end of the brake-shoe to operate the same, substantially as described.

7. In combination with the machine having a base-ange, a bracket of substantially rightangular form having one portion overlying' and secured to the upper face ot' said flange, and having' another portion depending at the side of the said flange, a brake-shoe of Substantiall y arched form having the lower ends of its arms pivoted to the depending portion of the bracket, the said brake-shoe beingkarranged between the bracket and inner side face or the pulley, a rock-shaft journaled in the ovcrlying part of the bracket, and a connection between the said rock-shaft and the brakeshoe, substantially as described.

8. In combination with a brake-shoe, a rockshaft connected therewith, a notched disk on the rock-shaft, and a gravity-latch for engag'- ing the notched disk with devices for operating `the gravity latch, substantially as described.

9. In combination with abrake-shoe, a rockshaft for operating' the same, a spring for placing the rock-shaft under tension, a gravitylatch for holding the rock-shaft and connections for operating the gravity-latch, substantially as described.

10. In combination with a brake comprising a shoe, a rock-shaft having an eccentric and a sectional block between the shaft and the shoe, one section of the block being on the eccentric and the other section pivoted to the brake-shoe with means for adjustably connecting the block-section, substantially as described.

11. In combination a brake mechanism, a vertical rod, means operated by the vertical movement thereof for actuating a let-ofil device and a pivoted block having' a cam-surface for operating the vertical rod and having an arm through which the brake is operated, substantially as described.

In testimony whereof I aiix my signature in presence of two witnesses.

FRANK I/VILCOIIB.

l/Vitnesscsi HENRY I. Fox, ABEL L. EvANs 

